package history.study.loop_back;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class LeetCode_216 {
    List<List<Integer>> result = new ArrayList<>();
    public List<List<Integer>> combinationSum3(int k, int n) {
        if (k < 0 || n < 0) return Collections.EMPTY_LIST;
        List<Integer> list = new ArrayList<>();
        backtracking(list,k, n);
        return result;
    }

    private void backtracking(List<Integer> list, int k, int n) {


    }
}
